安装依赖是报错如下：
npm install @vitejs/plugin-legacy terser -D
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: forum_web@0.0.0
npm ERR! Found: vite@2.9.15
npm ERR! node_modules/vite
npm ERR! dev vite@"^2.8.0" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer vite@"^3.0.0" from @vitejs/plugin-legacy@2.0.1
npm ERR! node_modules/@vitejs/plugin-legacy
npm ERR! dev @vitejs/plugin-legacy@"*" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See /Users/wf/.npm/eresolve-report.txt for a full report.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/wf/.npm/_logs/2022-08-25T12_40_23_352Z-debug-0.log
删掉node_models 重新 npm install 还是报错，最后发现是版本问题，安装指定版本正确安装,在npm 上找到一个1.8.2 ，安装成功
npm install @vitejs/plugin-legacy@1.8.2 terser -D
